LL51 broadband and area guide
Ofcom coverage, connection speeds, house prices and local data for 45 postcodes across 1 sector in Gwynedd.
Full fibre
0%
Gigabit
39%
Superfast
81%
Postcodes
45
LL51 comprises 45 Gwynedd postcodes with moderate gigabit reach (38.6%) and a substantial slow-speed contingent (11.1%). This compact district exhibits sharp internal connectivity variance.
Broadband speeds in LL51
Share of LL51 premises by the fastest download speed available, averaged across all 45 postcodes in the district.
Gigabit reaches 38.6% of LL51, implying selective cable coverage (zero full-fibre). Superfast is 80.8%, a mid-range result for Gwynedd. The speed composition divides into three segments: 38.6% access 300+ Mbps, 42.2% sit in the 30-300 superfast tier, and 11.1% fall below 10 Mbps. Below-USO premises account for 4.3%, nearly six times the UK average and indicating infrastructure gaps. LL51 represents a fragmented rural zone: cable-served postcodes enjoy gigabit, whilst copper-dependent or wireless-starved properties languish. The 11.1% below-10 Mbps rate, one premise in nine, is unacceptable by modern standards and suggests significant infrastructure debt.
Source: Ofcom Connected Nations. Percentages are district-wide averages of postcode-level availability, so rows may not sum to exactly 100%.
Connectivity in detail
Below 10 Mbps USO
4%
Premises unable to get the 10 Mbps universal service minimum
Fixed wireless
0%
Premises that can use a fixed wireless access service
Broadband by sector
LL51 splits into 1 postcode sector. Coverage and prices can differ street by street, so open a sector below to find your exact postcode.
| Sector | Postcodes | Superfast | Full fibre | Gigabit |
|---|---|---|---|---|
| LL51 9 | 45 | 81% | 0% | 39% |
All LL51 9 postcodes (45)
Best deals
Compare broadband deals in LL51
Deals are priced per address. Enter your full postcode to see every package available where you live.
Free comparison. Opens our deals partner in a new tab.
Living in Gwynedd
LL51's high slow-speed percentage makes it a higher-risk location; careful address verification is mandatory before committing to a property.
Remote worker score
48/100
Connectivity and amenities for home working
Family score
50/100
Schools, safety and family amenities
Value score
50/100
What you get for the local price level
LL51 broadband FAQs
Why do 11.1% of LL51 fall below 10 Mbps?
Sparse cable deployment leaves dispersed properties on aging copper or minimal wireless infrastructure, unable to support modern bandwidth demands.
Is LL51 suitable for remote work?
Conditional. Gigabit postcodes support it; the 11.1% below-10 Mbps tier does not. Verification is essential.
What's the typical speed for the majority of LL51?
42.2% sit in the 30-300 superfast band; 38.6% enjoy gigabit.
How many postcodes are in LL51?
LL51 is small, containing only 45 postcodes in Gwynedd.
Neighbouring districts
Check your exact postcode
Every postcode in LL51 has its own page with broadband speeds, house prices, school ratings and crime stats. You can also compare providers for your address.
Data sources: Broadband data from Ofcom Connected Nations 2025 · House prices from HM Land Registry · Crime from Police.uk · See all data sources